Is there an addiction to exercise... i.e. a 'Runner's High'?
Appeared in NYTimes online
http://www.nytimes.com/2002/05/21/health/fitness/21RUN.html?pagewanted=1&rd=hcmcp?
By GINA KOLATA
Dr. Brene and his colleagues reported that if they gave rats free access to a running wheel, they would run about about six miles a day. In that time, he finds, the three hallmark chemicals of addictive drugs — enkephalin, dynorphin and substance P — are produced in the reward centers of their brains.And to think...I wanted to spend less time here and more time exercising! But I guess it's just trading one addiction for another.The interpretation is that the same brain systems are affected by running and by addictive drugs, Dr. Brene said. "It is the same brain circuitry that is activated and it is possible that you can have the same pathology in the brain, the same addictive nature of the behavior."
cellomould
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